Building a 460
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Joined: Apr 2003
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Building a 460
I am looking for some advice on building a strong 460. Up to now all I have ever built are 289's and 302's. I want an engine with loads of torque. I was considering running pistons around 10:1 and a moderate lift cam, 280/.530. I have to replace the torque converter to run that cam. I have an MSD 6AL, ingnition, Pro Billet distributor, Moroso 11mm plug wires, Hooker headers and a Weiand Stealth intake. The heads are at the machine shop being match ported and the combustion chambers polished. I know with a small block you need lots of flow and I assume it is the same with a big block. Any advice on what piston and cam I should run to match my top end and still produce significant amounts of torque?
Postmaster
Joined: Aug 2001
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From: Nevada
Building a 460
The limiting factor will be your heads. You didn't mention if they're the early rail rocker or pedestal rocker type. A port match and polishing the combustion chambers won't provide that much help. The exhaust port is severely compromised and will only flow about 135cfm, compared to 175-200 when ported.
For stock heads, I'd recommend a cam of no more lift than around .500/510, with duration of 210/220 @ .050. The increased duration on the exhaust side will help with the exhaust port.
Regarding pistons, they'll depend on which head you're using. Early heads ('68-71) have 75-78cc chambers while later, pedestal rocker chambers run 92-98cc.
For stock heads, I'd recommend a cam of no more lift than around .500/510, with duration of 210/220 @ .050. The increased duration on the exhaust side will help with the exhaust port.
Regarding pistons, they'll depend on which head you're using. Early heads ('68-71) have 75-78cc chambers while later, pedestal rocker chambers run 92-98cc.
Posting Guru
Joined: Apr 2000
Posts: 1,249
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From: Pryor
Building a 460
It sounds like you are describing the engine I built last year. 460 running right at 10:1 P&P heads, CJ sized valves, Stealth intake, headers, Comp cam 218/226 @ 0.050 .514/.523, 750 carb. Mine has tons of torque down low. Running 3.25 gears with big tires it will smoke them starting off in second if you stall it. That's with a stck converter. No need to go with a higher stall unless you cam is at least two nothces bigger than mine. I can give full details including all parts, brand names etc, if desired. I haven't ran it through the quater mile yet, but by the seat of the pants it will take my '01 Lightning, especially the passing gear. Oh yeah, I am running pump gas on mine with no ping. Have to have everything just right though, A/F ratio, timing, plugs, etc.
JJ
JJ
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